Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  2c8915c9dba0e01ed2c9301a5640b97c9618ec69

Clean up ItemsPerSiteBuilderTest

I may be wrong but I don't think it's a good idea to make this Item
static.

Also the getter seems unnecesarry. Simplified to a const.

Change-Id: I147c709c2b6ff64b3a6a5898bff13fc30e4cc6b3